Ireland became the first in the world to ban smoking in pubs, restaurants, and workplaces.
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NASA's Mariner 10 became the first spacecraft to reach Mercury.
Queen Victoria opened the Royal Albert Hall in London.
Europe's longest bridge officially opened in Lisbon, Portugal.
China's famous Terracotta Army was uncovered by a group of farmers near Xi'an, China.
Beethoven performed in person for the first time.
